Results of a one year field study on injured rear seat car passengers sponsored by the Swiss Federal Police Administration are presented. In view of the aims of the study listed below, the investigations were confined to cases with an OAIS ≥ 2. Among the 2115 injured backseat passengers with an OAIS ≥ 1 registred by the Swiss Federal Bureau of Statistics in 1976, 371 could be identified with OAIS ≥ 2. Since all accidents involving injuries are to be reported to the Bureau of Statistics by the police the sample can be regarded as complete.